The Erotic Highway
Dear PowersD,
Your query is quite interesting. Books do not help to maintain erection per se, unless you prop your penis up against them and hope it stays that way 
.
In all seriousness, however, you may be a candidate for ED meds if you can't stay hard longer than a minute. On the other hand, if you are hard during masturbation, then it's a question of habituation. You will need to go very slowly with a living, breathing woman and try to do sensate focus. This means focusing on one body part at a time and being very sensual in an NON-DEMAND position.
You can read Bernie Zilbergeld's book The New Male Sexuality and follow his advice, which isn't significantly different from mine. At this point, I'd say you may be a candidate for ED meds, IN ADDITION to the no mas masturbation plan.
Get with a woman you trust (a big issue) and start exploring SENSUALITY without being so focused on erection. Other than that, you may also see a physician to try some ED meds, at least until you get more comfortable with a new sexual pattern (or partner.)
Good luck,
The Love Goddess